PURPOSE: To enable reproducing of color in specified ranges respectively with plural systems having different color reproducing ranges to be conducted by storing color compensation constant in accordance with standards of various signal systems and compensating a hue corresponding to standards of each signal systems.
CONSTITUTION: For instance, a primary signal of G is inputted to a system discriminating circuit 4, it is discriminated that which system is used for the signal by this system discriminating circuit 4, and the result is inputted to a microcomputer 5. The microcomputer 5 gives a constant to gain adjusting circuits 14-16, 24-26, 34-36 from a constant decision circuit 6 corresponding to each system in accordance with the result. Also, an output from a lamp time circuit 7 which measures used lamp time is given to the microcomputer 5, and a compensation constant caused by waste of the lamp is given to gain adjusting circuit 14-16, 24-26, 34-36. Matrix circuits of G, B, R are formed with gain adjusting circuit 14-16, 24-26, 34-36 and adders 11, 21, 31, and three colors are mixed with desired ratio.
FUNATSUKURI YASUO
ONISHI YOSHIHISA
